great,
thanks
thanks man saved my time
Can someone please explain why my code is not working? TIA!
#include <iostream>
using namespace std;
int partition(int arr[], int s, int e){
int pIndex = s;
int pivot = arr[e];
for(int i=s; i<=e; i++){
if (arr[i]<=pivot){
int temp = arr[i];
arr[i] = arr[pIndex];
arr[pIndex] = temp;
pIndex++;
}
}
return pIndex-1;
}
void quickSort(int arr[], int s, int e){
if(s<e){
int pIndex = partition(arr, s, e);
quickSort(arr, s, pIndex-1);
quickSort(arr, pIndex+1, e);
}
}
int main() {
int t;
cin>>t;
while(t--){
int n;
cin>>n;
int x[(4*n) - 1];
int y[(4*n) - 1];
for(int i=0; i<(4*n-1); i++){
cin>>x[i]>>y[i];
}
quickSort(x, 0, 4*n-2);
quickSort(y, 0, 4*n-2);
int xValue;
int xCount=1;
for(int i=1; i<((4*n) - 1); i++){
if(x[i]==x[i-1]) xCount++;
else{
if(xCount%2 == 0){
xCount=1;
}
else{
xValue = x[i-1];
break;
}
}
}
int yValue;
int yCount=1;
for(int i=1; i<((4*n) - 1); i++){
if(y[i]==y[i-1]) yCount++;
else{
if(yCount%2 == 0){
yCount=1;
}
else{
yValue = y[i-1];
break;
}
}
}
cout<<xValue<<" "<<yValue<<endl;
}
return 0;
}Java. Can some one please help me find the error in my code. It is failing for subtask 2
/* package codechef; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.Map.Entry;
/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
public static void main (String[] args) throws java.lang.Exception
{
BufferedReader br= new BufferedReader(new InputStreamReader(System.in));
int t= Integer.parseInt(br.readLine());
int a=0;
int b=0;
while(t-->0){
int N= Integer.parseInt(br.readLine());
HashMap<Integer,Integer> mapa= new HashMap<Integer,Integer>();
HashMap<Integer,Integer> mapb= new HashMap<Integer,Integer>();
for(int i=0;i<4*N-1;i++){
String[] input= br.readLine().split(" ");
int x= Integer.parseInt(input[0]);
int y= Integer.parseInt(input[1]);
mapa.put(x,mapa.getOrDefault(x,0)+1);
mapb.put(y,mapb.getOrDefault(y,0)+1);
}
for(Entry<Integer, Integer> entry: mapa.entrySet()) {
if(entry.getValue() == 1) {a=entry.getKey();}}
for(Entry<Integer, Integer> entry: mapb.entrySet()) {
if(entry.getValue() == 1) {b=entry.getKey();}}
//System.out.println(Arrays.asList(mapa));
//System.out.println(Arrays.asList(mapb));
System.out.println(a+" "+b);
}
}
}
I am probably late, but this should fix your issue.
Change it to
if(entry.getValue() % 2 == 1)